Rockwell Automation 1771-OAD User Manual

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Installation Instructions

AC (12Ć120V) Output Module

Cat. No. 1771ĆOAD Series C

To The Installer

Important User Information

This document provides information on:

To See page

Important User Information 1 Important PreĆinstallation Considerations 4 Calculate Power Requirements 5 Select the Mode of the FuseĆblown Jumper 5

Key the Backplane Connector 7

Install the Module and Field Wiring Arm 8

Connect Wiring to the Output Module 9

Troubleshooting 11

For this reference information See page

Interpreting the Status Indicators 11 Replacing the Fuse 12 Hazardous Locations 13 Specifications 14

Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. In no event will Rockwell Automation be responsible or liable for indirect or consequential damage resulting from the use or application of these products.

Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Rockwell Automation does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

Publication 1771ĆIN024B-EN-P - November 2002

AC (12-120V) Output Module2

Allen–Bradley publication SGI–1.1, Safety Guidelines for Application, Installation, and Maintenance of Solid–State Control (available from your local Rockwell Automation office), describes some important differences between solid–state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited.

Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard.

WARNING

ATTENTION

IMPORTAN

Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

Identifies information about practices or circumstances that may lead to personal injury or death, property damage, or economic loss.

Identifies information that is critical for successful application and understanding of the product.

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AC (12-120V) Output Module 3

ATTENTION

Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664–1), at altitudes up to 2000 meters without derating.

This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance.

This equipment is supplied as “open type” equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present, and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.

See NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosures. Also, see the appropriate sections in this publication, as well as the Allen–Bradley publication 1770–4.1, (“Industrial Automation Wiring and Grounding Guidelines”), for additional installation requirements pertaining to this equipment.

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AC (12-120V) Output Module4

PreĆinstallation Considerations

ATTENTION

Preventing Electrostatic Discharge

This equipment is sensitive to electrostatic discharge, which can cause internal damage and affect normal operation. Follow these guidelines when you handle this equipment:

• Touch a grounded object to discharge potential

static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component

boards.

• Do not touch circuit components inside the

equipment.

• If available, use a static–safe workstation.

• When not in use, keep modules in appropriate

static–safe packaging.

The 1771-OAD Series C module is compatible with all chassis except 1771-A1, 1771-A2 and 1771-A4 chassis. Make sure no other output module or single card block transfer module is placed in the same module group when using 2-slot addressing. Any discrete input module may be used within the same module group.

Using the 1771ĆOAD Series C Module with HalfĆwave Rectifying Load Devices (single diode) and Indicator Lights

This module uses zero-crossing technology to allow turn-on when the output voltage is less than a specified voltage (typically 40 to 50V). This greatly reduces the stress on contacts and other devices that are sensitive to current surges.

• When using this output module with a device that includes a

single diode in series with the load, place a shunt resistor (39K ohm, 1W) across the load. This resistor allows proper output operation.

The shunt resistor may cause LED indicators to glow when the output is turned off. In this case, use an incandescent lamp in place of the LED.

• When using a full-wave rectified device, the device may not turn

off when the output is deenergized. Add a 2.5K ohm, 10W resistor in parallel with the device to provide proper operation.

• If 24V ac incandescent indicator lights appear dim when used

with the Series C module, place a 2.5K ohm, 10W resistor in parallel with the indicator. This will restore full brightness.

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AC (12-120V) Output Module 5

Simplified Circuit Diagram

Control

1. When L2 is positive with respect to

L1, capacitor C1 is charged.

2. When the polarity switches, the diode

prevents C1 from discharging.

3. With C1 charged (possibly up to line

voltage), the zeroĆcrossing optoĆtriac sees that voltage, and won't turn on.

4. The shunt resistor allows a bleedĆoff of

the voltage on the capacitor, allowing the circuit to function properly.

ZeroĆCrossing OptoĆisolation

Calculate Power Requirements

39KΩ

Load

Single rectifying diode

in series with load. Shunt Resistor required

No rectifying diode.

Shunt Resistor NOT required

Full wave rectifier.

Shunt Resistor NOT required

Note: A resistor may be required if the load is less than 50mA.

Your module receives its power through the 1771 I/O chassis backplane from the chassis power supply. The module requires 295mA from the output of this supply. Add this to the requirements of all other modules in the I/O chassis to prevent overloading the chassis backplane and/or chassis power supply.

Select the Mode of the Fuse-Blown Jumper

The fuse-blown jumper has two modes:

• the preset, standard (STD) mode – displays the fuse status on

the red fuse-blown status indicator

• the customer side indication (CSI) mode – displays the fuse

status in the input image table and on the red fuse-blown status indicator.

This mode configures the module as a 16 point output module that uses both the output and input image data tables of your controller. When a fuse blows, all 16 bits in the associated input image table will turn on (1).

For example, if you install the module in a PLC-5 system and address the module as O:012, then the fuse status bits are in I:012.

To monitor the status of the module fuse, make certain that your user program monitors the module’s input image table for ‘‘on” bits.

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AC (12-120V) Output Module6

ATTENTION

Do not put the module jumper in CSI mode when you use this module in a complementary mode. Your system will not operate properly.

To change the fuse blown jumper to the CSI mode:

1. Locate the fuse-blown jumper at the top-right edge of the module circuit board, as shown.

TopĆright edge of circuit board

STD

Fuse Blown Jumper

(shown in preset STD position)

2. Use your finger to slide the jumper off the STD position (the middle post and the left post).

3. Carefully reposition the jumper by sliding it onto the CSI position (the middle post and the right post).

CSI

12636ĆI

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AC (12-120V) Output Module 7

Key the Backplane

ATTENTION

Connector

Place your module in any slot in the chassis except the leftmost slot, which is reserved for processors or adapters.

ATTENTION

Observe the following precautions when inserting or removing keys:

• insert or remove keys with your

fingers

• make sure that key placement is

correct

Incorrect keying or the use of a tool can result in damage to the backplane connector and possible system faults.

A module inserted into a wrong slot could be damaged by improper voltages connected through the wiring arm. Use keying bands to prevent damage to the module.

Position the keying bands in the backplane connectors to correspond to the key slots on the module.

I/O chassis

Place the keying bands:

- between 10 and 12

- between 20 and 22

Upper Connector

You can change the position of these bands if subsequent system design and rewiring makes insertion of a different type of module necessary.

11022ĆI

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AC (12-120V) Output Module8

Install the Module and Field Wiring Arm

1771ĆA1B, ĆA2B, ĆA3B, ĆA3B1, ĆA4B I/O chassis

locking tab

WARNING

ATTENTION

When you insert or remove the module while backplane power is on, or you connect or disconnect the wiring arm with field power applied, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure power is removed or the area is nonhazardous before proceeding.

Remove power from the 1771 I/O chassis backplane and field wiring arm before removing or installing an I/O module.

• Failure to remove power from the backplane or

wiring arm could cause module damage, degradation of performance, or injury.

• Failure to remove power from the backplane

could cause injury or equipment damage due to possible unexpected operation.

1771ĆA1B, ĆA2B, ĆA3B1, ĆA4B Series B I/O chassis

locking bar pin

locking bar

card guides

Snap the chassis latch over the top of the module to secure it.

Attach the wiring arm (1771ĆWH) to the horizontal bar at the bottom of the I/O chassis.

The wiring arm pivots upward and connects with the module so you can install or remove the module without disconnecting the wires.

The 1771–OAD series C module is a modular component of the 1771 I/O system requiring a properly installed system chassis. Refer to publication 1771–IN075 for detailed information on acceptable chassis, proper installation and grounding requirements. Limit the maximum adjacent slot power dissipation to 10W maximum.

module

Swing the chassis locking bar down into place to secure the modules. Make sure the locking pins engage.

horizontal bar

remove

install

card guides

module

19809

wiring arm

1771ĆWH

17643

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Connect Wiring to the Output Module

AC (12-120V) Output Module 9

Make wiring connections to the 21 terminal field wiring arm (cat. no. 1771-WH) shipped with the module.

You must supply ac (L1) at terminals A through D

on the field wiring arm, as shown. You need four ac connections to accommodate the total required surge rating on the module without overstressing any single connection on the field wiring arm. Jumper all ac (L1) connections together to prevent module damage.

L1 L1

Output 00

Output 01 Output 02

Output 03

Output 04

Output 05 Output 06

Output 07

Output 10

Output 11

Output 12

Output 13 Output 14

Output 15

Output 16 Output 17

L2/optional

Output Device

ac High

ac Low

Field Wiring Arm Cat. No. 1771ĆWH

(Actual wiring runs in this direction.)

12223-I

You must supply ac at terminals A through D on the wiring arm. You need four ac connections to accommodate the total required surge rating on the module without overstressing any single connection on the field wiring arm. Jumper all ac connections together to prevent module damage. Connect terminal E to ac Low.

ATTENTION

Observe proper polarity, as indicated in the connection diagram with dc power connections. Reverse polarity, or application of ac voltage, could damage the module.

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AC (12-120V) Output Module10

Driving an Input Module with an Output Module

You can use an AC (120V) Output Module (cat. no. 1771ĆOAD) to directly drive terminals on an AC/DC (120V) Input Module (cat. no. 1771ĆIAD) as shown below.

You can also use a 1771ĆOAD Output module to drive an AC/DC (120V) Input Module (cat. no. 1771ĆIA) but you must connect one of the following between the output terminal and L2 (common) as shown below.

• 2500 ohm, 10W resistor

• RGĆ1676Ć1 Electrocube (San Gabriel, California)

ac (12Ć120V)

Output Module

(Cat. No. 1771ĆOAD) (Cat. No. 1771ĆIAD)

120V ac High

ac Low

ac/dc (120V)

Input Module

ac (12Ć120V)

Output Module

(Cat. No. 1771ĆOAD)

ac/dc (120V)

Input Module

(Cat. No. 1771ĆIA)

120V ac High

2500 ohm 10W

resistor

ac Low

Use the same ac power source to power both modules to ensure proper phasing and prevent module damage.

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12224-I

AC (12-120V) Output Module 11

Output status OFF

Interpreting the Status Indicators

The front panel has one green module active indicator, 16 red status indicators, and one red fuse-blown indicator.

Module Active

ACTIVE 00

FUSE

Indicator Mode Description

Active

Standard Mode (STD)

Customer Side Indication (CSI)

Status

STD or CSI

Fuse The fuse indicator lights when the fuse has blown or been cleared.

Indicator (green)

00 to 17 Status

Indicators (red)

Fuse Blown Indicator (red)

12225-I

The active indicator lights when the rack power supply has properly established 5V dc and the processor is in RUN mode.

The active indicator lights when the rack power supply has properly established 5V dc.

The status indicators light when voltage is present at the respective output terminal.

Troubleshooting

Use this table to help you interpret the 1771-OAD status indicators and to troubleshoot module and system faults.

Indicator Status Description of Fault or System Status Action to Take

Module active ON (green) Normal Indication. None.

Module active ON (green) and Output status ON (red)

Module active ON (green) and

Module active OFF and Output status ON (red) or OFF

Fuse blown (red) Outputs will not turn on. Replace the fuse. If fuse replacement does not correct

Check voltage at output point on the swing arm.

If voltage is present, take no action. If no voltage is present, check the fuse. If the fuse is OK, replace the module.

No voltage. None.

Voltage on the terminal. Replace the module.

1. The processor is in program mode.

1. If module is in normal mode, take no action. If module is in CSI mode replace module.

2. Module not functioning properly.

2. Check the chassis power supply and processor. If they are OK, replace the module.

the problem, replace the module.

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AC (12-120V) Output Module12

Replacing the Fuse

The module’s output circuitry is protected from overload or shorts by a fuse. You can replace the fuse as outlined below.

1. Turn off all power to the I/O chassis and all output device power to the field wiring arm.

ATTENTION

Remove power from the 1771 I/O chassis backplane and field wiring arm before removing or installing an I/O module.

• Failure to remove power from the backplane or

wiring arm could cause module damage, degradation of performance, or injury.

• Failure to remove power from the backplane

could cause injury or equipment damage due to possible unexpected operation.

2. Remove the module from the chassis. Replace the blown fuse with a 12A, 250V rectifier fuse (1/4 x 1-1/4 inch), Bussman pt. no. GBB12.

Fuse

3. Replace the module in the chassis and attach the field wiring arm.

4. Turn OFF all outputs to the module.

5. Turn ON power to the I/O chassis only.

6. Check that the red status indicators on the front of the module are

off (no outputs on).

7. Turn on output device power to the field wiring arm.

8. Start with bit 00 and turn on individual outputs one at a time.

Turn off the previous output before turning on the next output.

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Hazardous Locations

AC (12-120V) Output Module 13

9. If the red fuse blown indicator turns on, note which output is faulty and trace the output wiring to the faulty device.

After correcting the fault problem, return to step 1 and begin again. If you cannot locate a faulty output, return to step 8 and turn on 2 or more outputs at the same time. Total output current should not exceed 2A per output, or 8A total per module.

The following information applies when operating this equipment in hazardous locations:

Products marked CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, and D Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest T" number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD -

• Do not disconnect equipment unless power has been removed or the area is

known to be nonhazardous.

• Do not disconnect connections to this equipment unless power has been

removed or the area is known to be nonhazardous. Secure any external connections that mate to this equipment by using screws, sliding latches,

threaded connectors, or other means provided with this product.

• Substitution of components may impair suitability for Class I, Division 2.

• If this product contains batteries, they must only be changed in an area known

to be nonhazardous.

Informations sur l'utilisation de cet équipement en environnements dangereux:

Les produits marqués CL I, DIV 2, GP A, B, C, D ne conviennent que une utilisation en environnements de Classe I Division 2 Groupes A, B, C, D dangereux et non dangereux. Chaque produit est livré avec des marquages sur sa plaque d'identification qui indiquent le code de température pour les environnements dangereux. Lorsque plusieurs produits sont combinés dans un systéme, le code de température le plus défavorable (code de température le plus faible) peut eatre utilisé pour déterminer le code de température global du systéme. Les combinaisons d'equipements dans le systéme sont sujettes à inspection par les autorités locales qualifiées au moment de l'installation.

AVERTISSEMENT

RISQUE D'EXPLOSION -

• Couper le courant ou s'assurer que l'environnement est classé non dangereux

avant de débrancher l'équipement.

• Couper le courant ou s'assurer que l'environnement est classé non dangereux

avant de débrancher les connecteurs. Fixer tous les connecteurs externes reliés à cet équipement à l'aide de vis, loquets coulissants, connecteurs filetés ou autres moyens fournis

avec ce produit.

• La substitution de composants peut rendre cet équipement inadapté à une

utilisation en environnement de Classe 1, Division 2.

• S'assurer que l'environnement est classé non dangereux avant de changer les

piles.

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AC (12-120V) Output Module14

Specifications

Outputs per Module 16

Module Location 1771ĆA1B through ĆA4B or later I/O chassis, 1771ĆAM1, ĆAM2 chassis

Output Voltage Range 10 to 138V ac @ 47 Ć 63Hz

Output Current Rating 2A per output - not to exceed 8A per module

Surge Current (maximum) 25A per output for 100ms, repeatable every 1 second

25A per module for 100ms, repeatable every 1 second

Minimum Load Current 5mA per output

On State Voltage Drop (max.) 1.5V at load current > 50mA

5.8V at load current < 50mA

Off State Leakage Current (max.) 3.0mA per output @ 138V ac

Signal Delay (max.) Off to On

On to Off

Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz Zero crossing 8.3ms @ 60Hz, 10.0ms @ 50Hz

Power Dissipation 13 Watts (max.), 1.5 Watts (min.)

Thermal Dissipation 48.0 BTU/hr (max.), 5.13 BTU/hr (min.)

Backplane Current 295mA

Isolation Voltage Tested to 2500V dc for 1s

Conductors Wire Size

Rockwell Automation 1771-OAD User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual